<template>
  <div style="padding-left:10px; padding-right: 10px; width: calc(100vw - 200px)">
    <!--    功能趋于-->
    <div style="margin: 10px 0">
      <el-button type="warning" plain @click="add" v-if="user.role===1">新增</el-button>
      <el-button type="primary" plain  v-if="user.role===1">导入</el-button>
      <el-button type="primary" plain  v-if="user.role===1">导出</el-button>
    </div>
    <!--    搜索区域-->
    <div style="margin: 10px 0">
      <el-input v-model="search" placeholder="请输入关键字" style="width: 20%" clearable></el-input>
      <el-button style="margin-left: 5px; background-color: #5defc1; color: white" @click="load" plain>查询</el-button>
    </div>
    <el-table
        :data="tableData"
        border
        stripe
        style="width: 100%">
      <el-table-column
          prop="id"
          label="ID"
          sortable>
      </el-table-column>
      <el-table-column
          prop="name"
          label="书籍名称">
      </el-table-column>
      <el-table-column
          label="书籍封面">
        <template #default="scope">
          <div class="demo-image__preview">
            <el-image
                style="width: 100px; height: 100px"
                :src="scope.row.cover"
                :preview-src-list="[scope.row.cover]">
            </el-image>
          </div>
        </template>
      </el-table-column>
      <el-table-column
          prop="price"
          label="单价">
      </el-table-column>
      <el-table-column
          prop="author"
          label="作者">
      </el-table-column>
      <el-table-column
          prop="createTime"
          label="发布时间">
      </el-table-column>

      <el-table-column
          fixed="right"
          label="操作"  v-if="user.role===1">

        <template #default="scope">
          <div style="display: flex; align-content: space-between">
            <el-button @click="handleEdit(scope.row)" type="primary">编辑</el-button>
            <el-popconfirm
                title="确定删除吗？" @confirm="handleDelete(scope.row.id)">
              <template #reference>
                <el-button type="danger">删除</el-button>
              </template>
            </el-popconfirm>
          </div>
        </template>
      </el-table-column>

    </el-table>



    <div style="margin: 10px 0">
      <el-pagination
          background
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="currentPage4"
          :page-sizes="[5, 10, 20]"
          :page-size="pageSize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total">
      </el-pagination>
      <!--弹窗-->
      <el-dialog
          title="提示"
          v-model="dialogVisible"
          width="30%">
        <el-form :model="form" label-width="120px">
          <el-form-item label="书籍名称">
            <el-input v-model="form.name"></el-input>
          </el-form-item>
          <el-form-item label="价格">
            <el-input v-model="form.price"></el-input>
          </el-form-item>
          <el-form-item label="作者">
            <el-input v-model="form.author"></el-input>
          </el-form-item>
          <el-form-item label="发布时间">
            <el-date-picker style="width: 100%;" value-format="YYYY-MM-DD" v-model="form.createTime" type="date" clearable></el-date-picker>
          </el-form-item>
          <el-form-item label="封面">
            <el-upload ref="upload" action="http://localhost:9090/files/upload" :on-success="filesUploadSuccess">
              <el-button type="primary">点击上传</el-button>

            </el-upload>
          </el-form-item>
        </el-form>
        <template #footer>
          <span class="dialog-footer">
            <el-button @click="dialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="save">确 定</el-button>
          </span>
        </template>
      </el-dialog>

    </div>
  </div>
</template>

<script>


import request from "@/utils/request";

export default {
  name: 'Book',
  components: {

  },
  data() {
    return {
      form: {},
      search:'',
      currentPage4: 1,
      pageSize: 10,
      total:0,
      dialogVisible:false,
      tableData: [],
      user:{}
    }
  },
  created() {
    this.load();

    let userStr =sessionStorage.getItem("user") || '{}';
    this.user = JSON.parse(userStr);
//请求后端服务器，确认当前登录用户的合法性
    request.get("/api/user/"+this.user.id).then(res=>{
      if (res.code==='0'){
        this.user = res.data;
      }
    });
  },
  methods:{
    load(){
      request.get("/api/book",{
        params: {
          pageNum: this.currentPage4,
          pageSize: this.pageSize,
          search: this.search
        }
      }).then(res =>{
        console.log(res);
        this.tableData = res.data.records;
        this.total = res.data.total;
      })
    },
    add(){
      this.dialogVisible = true;
      this.form = {};
      this.$nextTick(()=>{
        if (this.$refs['upload']){
          this.$refs['upload'].clearFiles();//清楚历史图片
        }
      });
    },
    save(){
      if (this.form.id){//更新
        request.put("/api/book",this.form).then(res =>{
          console.log(res);
          if (res.code==='0'){
            this.$message({
              type: "success",
              message: "更新成功"
            })
          }else {
            this.$message({
              type: "error",
              message: res.msg
            })
          }
          this.load();//刷新表格数据
          this.dialogVisible = false;//关闭弹窗
        });
      }else {//新增
        request.post("/api/book",this.form).then(res =>{
          console.log(res);
          if (res.code==='0'){
            this.$message({
              type: "success",
              message: "新增成功"
            })
          }else {
            this.$message({
              type: "error",
              message: res.msg
            })
          }
          this.load();//刷新表格数据
          this.dialogVisible = false;//关闭弹窗
        });
      }

    },
    handleEdit(row){
      this.form = JSON.parse((JSON.stringify(row)));
      this.dialogVisible = true;
      this.$nextTick(()=>{
        if (this.$refs['upload']){
          this.$refs['upload'].clearFiles();//清楚历史图片
        }
      });
    },
    handleSizeChange(pageSize){//改变当前页面个数
      this.pageSize = pageSize;
      this.load();
    },
    handleCurrentChange(pageNum){//改变当前页码
      this.currentPage4 = pageNum;
      this.load();
    },
    // currentPage4(){
    //
    // },
    handleDelete(id){
      console.log(id);
      request.delete("/api/book/"+id).then(res => {
        if (res.code==='0'){
          this.$message({
            type: "success",
            message: "删除成功"
          })
        }else {
          this.$message({
            type: "error",
            message: res.msg
          })
        }
        this.load()//重新加载
      });
    },

    filesUploadSuccess(res){
      console.log(res);
      this.form.cover = res.data;
      this.load();
    }

  }
}
</script>
